Image processing device and image processing method

Abstract

Provided are an image processing device and an image processing method. The image processing device comprises: a display; and a processor for determining an edge area within an input image and a peripheral area of the edge area, and determining a pixel value of the edge area on the basis of pixel characteristics of a plurality of pixels included in the peripheral area, thereby providing an image, in which the edge area is compensated on the basis of the determined pixel value, to the display.

The invention claimed is: 
     
       1. A display device, comprising:
 a display; and 
 a processor configured to: 
 identify an edge area included in an image and a peripheral area of the edge area, 
 compensate a pixel value corresponding to the edge area based on a pixel pitch between a first plurality of pixels corresponding to the peripheral area, and 
 control the display to display the image in which the pixel value of the edge area is compensated. 
 
     
     
       2. The display device as claimed in  claim 1 , wherein the processor is configured to detect a gradient based on a contrast among a second plurality of pixels included in the image, and identify the edge area based on a size of the gradient, and
 wherein the processor is configured to compensate the pixel value corresponding to the edge area based on an amount of luminescence of the first plurality of pixels. 
 
     
     
       3. The display device as claimed in  claim 2 , wherein the processor is configured to identify an area including the gradient of which the size of the gradient is greater than a predefined value as an edge center area, and maintain a second pixel value of the identified edge center area at an original brightness of a pixel. 
     
     
       4. The display device as claimed in  claim 3 , wherein the processor is configured to identify an area excluding the edge center area from among the edge area as an edge outskirt area, and control a brightness of pixels of the edge outskirt area by adjusting the amount of luminescence of the first plurality of pixels included in the peripheral area. 
     
     
       5. The display device as claimed in  claim 2 , wherein the processor is configured to compensate the pixel value of the edge area by using a function I′(x)=I(x)+f(g, d, L) on the basis of the pixel pitch, the amount of luminescence, and the gradient, and
 wherein the I′(x) represents an input pixel value of the edge area, the f(g, d, L) represents a function for lightening a brightness of the edge area, the g represents a value of the gradient, the d represents the pixel pitch among the first plurality of pixels included in the peripheral area, and the L represents the amount of luminescence of the first plurality of pixels included in the peripheral area. 
 
     
     
       6. The display device as claimed in  claim 1 , wherein the pixel pitch is a distance between pixels of the edge peripheral area facing based on the edge area. 
     
     
       7. The display device as claimed in  claim 1 , wherein the display comprises a light-emitting diode (LED). 
     
     
       8. An image processing method, comprising:
 identifying an edge area included in an image and a peripheral area of the edge area; 
 compensating a pixel value corresponding to the edge area based on a pixel pitch between a first plurality of pixels corresponding to the peripheral area; and 
 displaying the image in which the pixel value of the edge area is compensated. 
 
     
     
       9. The image processing method as claimed in  claim 8 , wherein the identifying the edge area within the image and the peripheral area of the edge area further comprises detecting a gradient based on a contrast among a second plurality of pixels included in the image, and
 wherein the compensating further comprises the pixel value corresponding to the edge area based on an amount of luminescence of the first plurality of pixels. 
 
     
     
       10. The image processing method as claimed in  claim 9 , wherein the compensating further comprises:
 identifying an area including the gradient of which the size of the gradient is greater than a predefined value as an edge center area; and 
 maintaining a second pixel value of the identified edge center area at an original brightness of a pixel. 
 
     
     
       11. The image processing method as claimed in  claim 10 , wherein the compensating further comprises:
 identifying an area excluding the edge center area from among the edge area as an edge outskirt area; and 
 controlling a brightness of pixels of the edge outskirt area by adjusting the amount of luminescence of the first plurality of pixels included in the peripheral area. 
 
     
     
       12. The image processing method as claimed in  claim 9 , wherein the compensating further comprises compensating a pixel value of the edge area by using a function I′(x)=I(x)+f(g, d, L) on the basis of the pixel pitch, the amount of luminescence, and the gradient, and
 wherein the I′(x) represents an input pixel value of the edge area, the f(g, d, L) represents a function for lightening a brightness of the edge area, the g represents a value of the gradient, the d represents the pixel pitch among the first plurality of pixels included in the peripheral area, and the L represents the amount of luminescence of the first plurality of pixels included in the peripheral area. 
 
     
     
       13. The image processing method as claimed in  claim 8 , wherein the pixel pitch is a distance between pixels of the edge peripheral area facing based on the edge area. 
     
     
       14. The image processing method as claimed in  claim 8 , wherein the display comprises a light-emitting diode (LED).